id:A011949 - OEIS Search Results

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A011949

Number of Barlow packings with group P6(bar)m2 that repeat after 2n layers.

+0
1

1, 2, 6, 12, 28, 56, 119, 240, 496, 990, 2016, 4032, 8121, 16256, 32640, 65268, 130816, 261630, 523747, 1047552, 2096128, 4192200, 8386554 (list; graph; listen)

	OFFSET	`3,2`
	REFERENCES	`T. J. McLarnan, The numbers of polytypes ..., Zeits. Krist. 155, 269-291 (1981).`
	CROSSREFS	`Sequence in context: A141082 A159553 A112510 this_sequence A089820 A141447 A122746` `Adjacent sequences: A011946 A011947 A011948 this_sequence A011950 A011951 A011952`
	KEYWORD	`nonn,easy`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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